69 lines
1.5 KiB
C
69 lines
1.5 KiB
C
/*
|
|
* Copyright (C) 2017 ARM Ltd.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#ifndef __ASM_DAIFFLAGS_H
|
|
#define __ASM_DAIFFLAGS_H
|
|
|
|
#include <linux/irqflags.h>
|
|
|
|
#define DAIF_PROCCTX 0
|
|
#define DAIF_PROCCTX_NOIRQ PSR_I_BIT
|
|
#define DAIF_ERRCTX (PSR_I_BIT | PSR_A_BIT)
|
|
|
|
/* mask/save/unmask/restore all exceptions, including interrupts. */
|
|
static inline void local_daif_mask(void)
|
|
{
|
|
asm volatile(
|
|
"msr daifset, #0xf // local_daif_mask\n"
|
|
:
|
|
:
|
|
: "memory");
|
|
trace_hardirqs_off();
|
|
}
|
|
|
|
static inline unsigned long local_daif_save(void)
|
|
{
|
|
unsigned long flags;
|
|
|
|
flags = arch_local_save_flags();
|
|
|
|
local_daif_mask();
|
|
|
|
return flags;
|
|
}
|
|
|
|
static inline void local_daif_unmask(void)
|
|
{
|
|
trace_hardirqs_on();
|
|
asm volatile(
|
|
"msr daifclr, #0xf // local_daif_unmask"
|
|
:
|
|
:
|
|
: "memory");
|
|
}
|
|
|
|
static inline void local_daif_restore(unsigned long flags)
|
|
{
|
|
if (!arch_irqs_disabled_flags(flags))
|
|
trace_hardirqs_on();
|
|
|
|
arch_local_irq_restore(flags);
|
|
|
|
if (arch_irqs_disabled_flags(flags))
|
|
trace_hardirqs_off();
|
|
}
|
|
|
|
#endif
|